Fitting for reinforcing-frames.



G. M. GRAHAM. FITTING FOR RBINFORGING FRAMES.

APPLIGATION FILED APR. 21. 1909.

Patented Nov. 29,1910.

2 SHEETSSHBET 1.

G. M. GRAHAM.

FITTING FOB. REINFORGING FRAMES.

APPLICATION FILED APR. 21. 1909.

Patented Nov. 29, 1910.

2 SHEETS-SHEET 2.

' PATENT OFFICE.

GEORGE M. GRAHAM, 0F CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,TO SUSPENSION STEEL CONCRETE COMPANY, A CORPORATION OF DELAWARE.

FITTING FOR REINFORCING-FRAMES.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application led April 21, 1909. Serial No. 491,343.

To all Awhom it may concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Fittingsfor Reinforcing-Frames, of which the following is a specification.

This invention relates to the particular form of truss girders or beamsfor skeleton frames of reinforced concrete structures which forms thesubject matter .of my prior Letters Patent No. 889,223, dated June 2,1908, and No. 919,714, dated April 27, 1909, and has for its object toprovide a simple and efficient structural formation of the couplingpieces adapting the same for substantial connection to the frame postsand beams so that a minimum thickness of the concrete portion of thewall, floor, etc., is required to inclose said connecting parts, andwhich construction also affords a simple, convenient and effectiveabutment connection for the truss wires of the beams, all as willhereinafter more fully appear.

In the accompanying drawings: Figure 1, is a detail perspectiveview of acorner portion of a reinforcing frame having the present inventionapplied. Fig. 2, is a detail sectional plan of the same. Fig. 3, is adetail front elevation of one form of the angular coupling piece adaptedfor the connection of untrussed beams to each other and to the posts.Fig. 4, is a side elevation of the same. Fig. 5, is a detail frontelevation of another form of the coupling` piece adapted for connectingtrussed beams to eachother and to the posts and providing means for theattachment of the ends of the tension members of the truss formations.Fig. 6, is a side elevation of the same.

Similar' numerals of reference indicate like parts in the differentviews.

As represented in the drawings the arrangement of the parts will besubstantially the same as in my before mentioned Patent No. 889,223, andwill involve the usual round corner post or column 1, and round beams orgirders 2 connected together and to said post by coupling piecesconstructed as follows 3 is a coupling piece above referred to, therespective members of which are in angular relation to each other asshown, and have their outer faces concave to fit the conveXity of around post or beam as in my aforesaid patented construction.

4 are elongated recesses formed in the opposite or inner faces of thecoupling members aforesaid by marginal or border flanges 5 and adaptedto receive the heads or nuts of the fastening bolts 6, the Shanks ofwhich pass through orifices in the bottom webs of said recesses andthrough the post and beam to rigidly connect the parts together. As soconstructed a minimum degree of projection of coupling means is providedand in turn entails a corresponding decrease in the thickness of theconcrete wall required to properly inclose the parts. As in my formerpatent construction, pairs of said coupling pieces, arranged on commonupper and lower planes, are used in the connection of the ends ofadjacent beams to a post of the frame, and in order that the fasteningbolts 6, aforesaid, do not interfere with each other a multiple seriesof bolt holes are formed in each coupling member, aforesaid, in orderthat the bolts extending O in opposite directions through the parts maybe readily arranged in the required staggered or alternated relation asillustrated in Figs. 1 and 2. As so formed the one pattern of couplingpiece is capable of use in both instances, and materially aids in theprocess of erection.

Another part of the present invention involves the formation of abracket as above described with anchor or attaching means for the endsof the multiple wire or rod tension members of the beam truss describedin my prior Letters Patent No. 919,714, dated April 27, 1909, andconsists in the enlargement of a coupling piece at the point ofintersection of its members, and the formation of an open side orifice 7in said enlargement to form opposed horns 8 around which the rods orwires 9 of the tension member of a beam truss are looped, as shown. Thetruss for a beam above referred to will preferably comprise a pair oflateral struts or queen posts 10, arranged in spaced relation, andhaving end bearing against a round beam 2. At their other ends saidqueen posts carry bearing shoes 11 to receive the wire or rod tensionmembers 9 of the truss, as described in detail in my former LettersPatent of April 27, 1909.

Having thus fully described my said in- Vention What, I claim as newanddesire to secure by Letters Patent, is

l. The combination in a skeleton reinforcing'frame for concretestructures, of a round post,"'a pair of round beams in angular relationand abutting against said post, coupling piecesrthe members of which arein angular relation, each member having a coneaved surface on one sideto fit'a post or beam, an elongated recess in the other side formedA byborder flanges on the member and a series'o'fv bolt holes in the web ofsaid recess, and a series of fastening bolts passing through saidmembers and entirely through the posts and beams, substantially as setforth. y

2.- The combinationin a skeleton reinforc- S ing frame for concretestructures, of a round post, a pair of round beams inangular relationand abutting against said post, coupling pieeespthe members of which arein angular relation, each member having a coneaved surface on one sideto fit a post or beam, an elongated recess in the other side formed byborder flanges on the member and a multiple series of b olt holes in theWeb of said recess,

and a series of fastening bolts passingthrough said members and entirelythrough the posts and beams in staggered relation, substantially as setforth.l

3. The combination in a skeleton reinforcing frame for concretestructures, of a round post, a pair of round beams in angular relationand abutting against said post, coupling pieces the members of Which arein angular relation vand -provided with an enlargement attheir point ofintersection, the enlargement having an open side orice forming opposedhorns, a series of fastening bolts passing through said members andentirely through the posts andbeams, and a lateral truss consisting ofintermediate struts and tension members extending from post to post,over said struts, and looped around the horns aforesaid, substantiallyas set forth.

Signed at Chicago, Illinois, this 12th day of April 1909.

GEORGE M. GRAHAM. Witnesses.:

ROBERT BURNS, L. HOLDEN.

